VB使用ADO对象链接数据库

 1. 定义连接对象

  Global DBconnect As New ADODB.Connection

  2. 执行连接语句

  If DBconnect.State = adStateOpen And Not IsEmpty(adStateOpen) Then DBconnect.Close

  连接ODBC

  DBconnect.ConnectionString = "dsn=DataAliasName;uid=UserID;pwd=Passwd;"

  直接连接Access

  Dbconnect.Provider = "Microsoft.jet.OLEDB.4.0" // Access 97为3.51

  DBconnect.ConnectionString = "FilePathFileName.mdb"

  连接Oracle

  DBconnect.Provider = "MSADORA"

  DBconnect.ConnectionString = "user/mypass@servicename

  连接SQL Server

  DBconnect.Provider = "SQLOLEDB.1"

  DBconnect.ConnectionString = "DATABASE= ;SERVER= ;UID= ;PWD= ;"

  或者可以使用 DBconnect.Open "SERVER" , "USERID" , "PASSWORD"

  DBConnect.Open

  3. 取查询结果集

Global RS As New ADODB.Recordset
Global PS As New ADODB.Recordset
If RS.State = adStateOpen And Not IsEmpty(adStateOpen) Then RS.Close
   RS.Open SQLStr, DBconnect, adOpenKeyset

  4. 执行SQL语句

  DBconn.Execute SQLStr

  5. 关闭数据库

  DBconnect.Close

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